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Initial Operation; Switching On And Off; Automatic Leveling - Bosch GLL50-20 Operating/Safety Instructions Manual

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Initial Operation

Do not leave the switched-
on laser measure unattend-
ed and switch the laser measure off after use.
Other persons could be blinded by the laser
beam.
Do not point the laser beam
at persons or animals and
do not look into the laser beam yourself, not
even from a long distance.
Protect the laser measure against moisture
and direct sun light.
Do not subject the tool to extreme tempera-
tures or variations in temperature. As an exam-
ple, do not leave it in vehicles for longer periods.
In case of large variations in temperature, allow
the tool to adjust to the ambient temperature
before operation. In case of extreme tempera-
tures or variations in temperature the accuracy
of the tool can be impaired.
Avoid heavy impact or falling of the tool. After
heavy exterior impact on the tool, an accuracy
check should always be carried out before con-
tinuing to work.
Switch the tool off during transport. Slide
the On/Off switch 3 to the "Off" position when
transporting the measuring tool. This locks the
leveling unit, which can be damaged in case of
intense movement.

Switching On and Off

To switch on the tool, slide the On/Off switch 3
to the "On" position. Immediately after switch-
ing on, the tool sends laser beams from the laser
beam outlets 2.
To switch off the tool, slide the On/Off switch
3 to the "Off" position. When switching off, the
leveling unit is locked.
12
160992A8JG GLL50-20 G 202306.indd 12
Operation
Application
The measuring tool is used for determining and
checking horizontal and vertical lines.

Automatic Leveling

Working with Automatic Leveling
Position the tool on a level and firm base or to
a tripod 18.
After switching on, the leveling function au-
tomatically compensates irregularities within
the self-leveling range of ±3.5º. The leveling is
finished as soon as the laser beams no longer
move.
If the measuring tool surface deviates more than
±3.5º from the horizontal plane, then the auto-
matic leveling function is not possible and the
laser beams will flash. The lines will flash 1 s off
3 s on continually.
In this case, bring the tool to the level position
and wait for the self-leveling to take place. As
soon as the tool is within the self-leveling range
of ±3.5º, then the laser lines will continuously
light up.
In case of ground vibrations or position changes
during operation, the tool is automatically level
again. To avoid errors, check the position of the
horizontal and vertical laser line with regard to
the reference points upon re-leveling.
6/9/23 9:46 AM

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